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dc.contributor.advisorChu, Peter C.
dc.contributor.authorEarls, Patrick J.
dc.dateSep-12
dc.date.accessioned2012-11-14T00:02:29Z
dc.date.available2012-11-14T00:02:29Z
dc.date.issued2012-09
dc.identifier.urihttp://hdl.handle.net/10945/17360
dc.description.abstractBottom roughness has a significant effect on acoustic backscattering on the ocean bottom. Sonar systems rely on backscattering and shadows for detecting objects lying on the seafloor. The seafloor is rather complex including craters, gullies, seaweed, rocks, sand ridges, tall obstructions, deep holes and sloping regions. Underwater mines can be hidden around these objects to make detection more difficult. High resolution (1 m 1 m) seafloor data collected by the Navy using multibeam echo sounder (EM710) off the western coast of Saipan was processed by the MB Systems. The advanced least-square method is used to establish new bottom reference level from the EM710 data. After removing the reference level, the high-resolution bathymetry data converts into bottom roughness percentage using a threshold. The calculated bottom roughness percentage is ready to be incorporated into the current Navy doctrine. Two new (gradient and mathematical morphology) methods have been developed in this thesis to calculate the bottom roughness without the reference level. Statistical analysis was conducted to illustrate the added value of the new bottom roughness calculation.en_US
dc.description.urihttp://archive.org/details/newbottomroughne1094517360
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.titleNew Bottom Roughness Calculation from Multibeam Echo Sounders for Mine Warfareen_US
dc.typeThesisen_US
dc.contributor.secondreaderBetsch, Ronald
dc.contributor.departmentPhysical Oceanography
dc.subject.authorMine Warfareen_US
dc.subject.authorBottom Roughnessen_US
dc.subject.authorEM710 Multibeam Echo Sounderen_US
dc.subject.authorBathymetryen_US
dc.subject.authorBackscattering.en_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameMaster of Science in Physical Oceanographyen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplinePhysical Oceanographyen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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